Hyundai i40 (2015) is 356 mm (14.02 inch) longer, 19 mm (0.75 inch) wider and has 100 liters (3.53 ft3) bigger cargo space than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 92 mm (3.62 inch) higher and 67 kg (148 lbs) lighter than Hyundai i40 (2015).